Add mesh generation delay

builtin/settingtypes.txt

@@ -511,6 +511,10 @@ hud_hotbar_max_width (Maximum hotbar width) float 1.0
 #    Enables caching of facedir rotated meshes.
 enable_mesh_cache (Mesh cache) bool false
 
+#    Delay between mesh updates on the client in ms. Increasing this will slow
+#    down the rate of mesh updates, thus reducing jitter on slower clients.
+mesh_generation_interval (Mapblock mesh generation delay) int 0 0 50
+
 #    Enables minimap.
 enable_minimap (Minimap) bool true
 

minetest.conf.example

@@ -594,6 +594,11 @@ enable_client_modding (Client modding) bool false
 #    type: bool
 # enable_mesh_cache = false
 
+#    Delay between mesh updates on the client in ms. Increasing this will slow
+#    down the rate of mesh updates, thus reducing jitter on slower clients.
+#    type: int min: 0 max: 50
+# mesh_generation_interval = 0
+
 #    Enables minimap.
 #    type: bool
 # enable_minimap = true

src/client.cpp

@@ -157,6 +157,12 @@ QueuedMeshUpdate *MeshUpdateQueue::pop()
 	MeshUpdateThread
 */
 
+MeshUpdateThread::MeshUpdateThread() : UpdateThread("Mesh")
+{
+	m_generation_interval = g_settings->getU16("mesh_generation_interval");
+	m_generation_interval = rangelim(m_generation_interval, 0, 50);
+}
+
 void MeshUpdateThread::enqueueUpdate(v3s16 p, MeshMakeData *data,
 		bool ack_block_to_server, bool urgent)
 {
@@ -168,7 +174,8 @@ void MeshUpdateThread::doUpdate()
 {
 	QueuedMeshUpdate *q;
 	while ((q = m_queue_in.pop())) {
-
+		if (m_generation_interval)
+			sleep_ms(m_generation_interval);
 		ScopeProfiler sp(g_profiler, "Client: Mesh making");
 
 		MapBlockMesh *mesh_new = new MapBlockMesh(q->data, m_camera_offset);

src/client.h

@@ -120,13 +120,14 @@ class MeshUpdateThread : public UpdateThread
 {
 private:
 	MeshUpdateQueue m_queue_in;
+	int m_generation_interval;
 
 protected:
 	virtual void doUpdate();
 
 public:
 
-	MeshUpdateThread() : UpdateThread("Mesh") {}
+	MeshUpdateThread();
 
 	void enqueueUpdate(v3s16 p, MeshMakeData *data,
 			bool ack_block_to_server, bool urgent);

src/defaultsettings.cpp

@@ -38,6 +38,7 @@ void set_default_settings(Settings *settings)
 	settings->setDefault("enable_sound", "true");
 	settings->setDefault("sound_volume", "0.8");
 	settings->setDefault("enable_mesh_cache", "false");
+	settings->setDefault("mesh_generation_interval", "0");
 	settings->setDefault("enable_vbo", "true");
 	settings->setDefault("free_move", "false");
 	settings->setDefault("fast_move", "false");

src/settings_translation_file.cpp

@@ -245,6 +245,8 @@ fake_function() {
 	gettext("Maximum proportion of current window to be used for hotbar.\nUseful if there's something to be displayed right or left of hotbar.");
 	gettext("Mesh cache");
 	gettext("Enables caching of facedir rotated meshes.");
+	gettext("Mapblock mesh generation delay");
+	gettext("Delay between mesh updates on the client in ms. Increasing this will slow\ndown the rate of mesh updates, thus reducing jitter on slower clients.");
 	gettext("Minimap");
 	gettext("Enables minimap.");
 	gettext("Round minimap");